2a-5+7a=15-a

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Solution for 2a-5+7a=15-a equation:


Simplifying
2a + -5 + 7a = 15 + -1a

Reorder the terms:
-5 + 2a + 7a = 15 + -1a

Combine like terms: 2a + 7a = 9a
-5 + 9a = 15 + -1a

Solving
-5 + 9a = 15 + -1a

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add 'a' to each side of the equation.
-5 + 9a + a = 15 + -1a + a

Combine like terms: 9a + a = 10a
-5 + 10a = 15 + -1a + a

Combine like terms: -1a + a = 0
-5 + 10a = 15 + 0
-5 + 10a = 15

Add '5' to each side of the equation.
-5 + 5 + 10a = 15 + 5

Combine like terms: -5 + 5 = 0
0 + 10a = 15 + 5
10a = 15 + 5

Combine like terms: 15 + 5 = 20
10a = 20

Divide each side by '10'.
a = 2

Simplifying
a = 2

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